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The Ordinary Lactic Acid 5% + HA 2%

The Ordinary Authentic
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The Ordinary Lactic Acid 5% + HA 2% by The Ordinary


Lactic Acid is an alpha hydroxyl acid that exfoliates the skin. The Ordinary Lactic Acid 5% + HA 2% offers very mild exfoliation and is supported with a purified Tasmanian pepperberry known to reduce signs of inflammation and sensitivity that is often associated with exfoliation.

This formula contains a studied Tasmanian Pepperberry derivative to help reduce irritation associated with acid use. This derivative is of plant origin and varies in colour seasonally and this colour variation may be apparent in the formula from time to time.

When to not use The Ordinary Lactic Acid 5% + HA 2%: Lactic Acid should not be used on sensitive, peeling or compromised skin. Please refer to additional sun protection note and other warnings in provided Directions.


This pH of this formula is approximately 3.8. Lactic Acid has a pKa of 3.8 and pKa is the most important aspect to consider in formulating with acids. pKa implies acid availability.  When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing effectiveness of the acid and reducing irritation.  Higher pH numbers in such a case would increase salt which counter-intuitively would make the formula even more irritating than if the formula was more acidic.

We suggest this product be used within 12 months after opening.


Aqua (Water), Lactic Acid, Glycerin, Pentylene Glycol, Propanediol, Sodium Hydroxide, Sodium Hyaluronate Crosspolymer, Tasmannia Lanceolata Fruit/Leaf Extract, Hydroxyethylcellulose, Isoceteth-20, Trisodium Ethylenediamine Disuccinate, Ethylhexylglycerin, 1,2-Hexanediol, Caprylyl Glycol.

From the Ordinary: Our formulations are updated from time to time as part of our commitment to innovation. As such, the ingredient list shown here may vary from the box of the product depending on time and region of purchase. Lactic Acid has a natural odour that some people find unpleasant. This formula was updated in October 2017 to use a grade of lactic acid that has no odour per customer feedback. Additionally, this update removed the use of carrageenan, a seaweed-based viscosity-enhancer, also due to feedback from customers. These changes improve the sensory aspects of the formula but do not impact efficacy.

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Reviews (15)
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Great for those new to acids - 13-03-2018 by

A gentle exfoliant that will help anyone who is new to the world of facial acids.
Worked well with my combination skin and did not leave any reactions.

Gentle exfoliant - 27-02-2018 by

Nice, gentle exfoliant. You can see and feel the difference in like 3 minutes. Highly recommend.

Great acid to start with - 28-01-2018 by

Great product, have been using this over the past few months along with the Niacinamide 10% and the two products have cleared my acne and refined the texture of my skin.

I never experienced any stinging (granted, my skin isn't very sensitive) and it sank in quickly leaving no residue.

I won't repurchase as I'm stepping up to a stronger acid but definitely recommend this product to people who are starting to experiment with acids or anyone with sensitive skin as it is such a gentle formulation.

smooth skin after use - 11-01-2018 by

Good product, would recommend. I noticed my skin feeling smoother immediately after use.

Great for clearing acne - 19-12-2017 by

I love this. Along with the Glycolic Toner and Niacinamide from The Ordinary it has changed my skin. Using these in combination with using oils (marula, rosehip, almond and jojoba), gentle cleansers and nothing stripping, I have all but eliminated my adult acne. I think this is the real star though, helping clear blackheads and eliminate acne before it begins.
This smells a little funky, and is tacky feeling. I use at night only, and only twice a week.
Highly reccommend to those trying to clear their skin.

Affordable and effective. - 04-12-2017 by

I've been really enjoying using this product once a week. I feel like my skin is getting clearer. I've been using it at night and waking up in the morning with glowing skin. I like that it is not too harsh and that I am seeing results when I use this product.

Gentle exfoliation - 29-11-2017 by

I love The Ordinary's products and this does not disappoint. I have combination/sensitive skin and this works amazingly to control oil and shine without being too harsh. I use it only twice a week so this bottle will go a long way. Great price too.

Makes skin clearer and softer! - 13-11-2017 by

For the price, this stuff is amazing. I apply it with a cotton pad twice a week so I don't apply too much and dry out my skin. I use it alternating with a physical exfoliator and my skin is clearer and brighter. Definitely worth the price!

Super soft skin - 23-10-2017 by

I made the switch from physical exfoliators to this serum a couple of months ago and I'm never looking back. I have (very) dry skin and the flakiness of it can get out of control. Maybe it renews too quickly... I'm not sure, but I used to feel like I needed to exfoliate all the time and although it would give temporary relief, it just made my skin even drier. Now I use this stuff about twice a week and it's all I need. Especially the first morning after, my skin is so smooth! Despite my dry facial skin, I do get a greasy back (and bacne... Eewl!) and this really helps with that as well. So I feel like it would be good for all skin types. This doesn't irritate my skin and doesn't sting at all. It's just an allround winner. Highly recommend!

A must! - 24-08-2017 by

Put this on at night and you will wake up with clear, smooth and glowy skin. I have oily combo skin and this has controlled the oil slick. Loveeee

So gentle - 08-08-2017 by

I love this product, I find it super convenient! I struggle to use scrubs as I find them quite uncomfortable and harsh for my skin. This can be applied straight after cleansing on dry skin and that's it! I also have found it has helped control any congestion and breakouts.

Excellent Result - 02-08-2017 by

I am new to this product. I used to apply this everyday. This doesn't dry out my skin. My skin feels smooth now. Highly recommended.

Effective, affordable product - 16-06-2017 by

I have enjoyed this product so far. I have used pretty much every evening for the last two weeks and haven't had any irritation or issues.

Good for sensitive skin - 09-06-2017 by

I have been using this product for about 3 weeks on and off (I get lazy sometimes) and notice my face always feels smoother the next day if I use it the night before. My skin is crazy sensitive and I have not had a problem with this product at all. I'm really loving this!

Love love love - 18-05-2017 by

This product I put on at night and it makes my skin feel so soft by morning. Amazing product amazing price!

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